Lyman Wadcutter Mould

LYman 4 cav 38 wad cutter molds - Cast Boolits

HM- I have never heard of anyone having this problem. In fact, all I've heard of is just the opposite- undersized moulds. Not being a wise guy, but did you check your mic against a standard? If you have a good mic then you might consider trading the moulds here for someone with a smaller mould. FWIW- my 4 banger 429421 cast around .431+ in WW alloy. "The bullet diameters and weights presented in this list are based on the use of Taracorp’s Lawrence Magnum bullet alloy (2% tin, 6% antimony, 1/4% arsenic, 91.75% lead). Bullet diameters and weights will vary considerably depending on the lead casting alloy used. This variation can be as much as 1/2% on the diameter, and 8% on the weight among the most commonly used casting the smallest diameter and heaviest weight, with such bullets running approximately .3% smaller in diameter and 3% heavier than bullets cast with Taracorp's metal. Linotype will produce bullets with the largest diameter and lightest weights. This alloy will produce bullets approximately 1/10% larger and 3% lighter than Taracorp. Other alloys of tin and antimony, with antimony content above 5%, will produce bullets with diameters and weights falling between those cast from wheel weights and linotype. Alloys containing little or no antimony will cast considerably smaller than wheel weights and in some cases will produce bullets too small for adequate sizing. Within the limitations given above, the weight and diameter of a cast bullet can be adjusted by varying the alloy’s antimony content. The size and weight of bullets of a given alloy will also vary according to casting temperature. Higher temperatures will result in greater shrinkage as the bullet cools, thereby producing a slightly smaller and lighter bullet than one cast of the same alloy at a lower temperature.

Journal of the Association of Official Analytical Chemists

The Gun Digest Book Of The 1911, A Complete Look At The Use, Care & Repair of the 1911 Pistol

Gun Digest, 1993

Gun Digest Book of the .44

Lyman reloading handbook